add more validator reward types for xDai

[ayrat555]

fixes

2019-06-14T07:34:24.194 application=indexer fetcher=block_catchup first_block_number=3390348 last_block_number=3390348 [error] ** (FunctionClauseError) no function clause matching in EthereumJSONRPC.Parity.FetchedBeneficiaries.get_address_type/2
    (ethereum_jsonrpc) lib/ethereum_jsonrpc/parity/fetched_beneficiaries.ex:172: EthereumJSONRPC.Parity.FetchedBeneficiaries.get_address_type("external", 5)
    (ethereum_jsonrpc) lib/ethereum_jsonrpc/parity/fetched_beneficiaries.ex:156: EthereumJSONRPC.Parity.FetchedBeneficiaries.trace_to_params_set/3
    (ethereum_jsonrpc) lib/ethereum_jsonrpc/parity/fetched_beneficiaries.ex:132: anonymous fn/3 in EthereumJSONRPC.Parity.FetchedBeneficiaries.traces_to_params_set/2
    (elixir) lib/enum.ex:3015: anonymous fn/3 in Enum.reduce/3
    (elixir) lib/stream.ex:1556: anonymous fn/3 in Enumerable.Stream.reduce/3
    (elixir) lib/stream.ex:1047: anonymous fn/3 in Stream.with_index/2
    (elixir) lib/enum.ex:3317: Enumerable.List.reduce/3
    (elixir) lib/stream.ex:1568: Enumerable.Stream.do_each/4


Retrying.

Changelog

• add more validator reward types for xDai

[coveralls]

Pull Request Test Coverage Report for Build f5d86590-f245-4825-898e-1e056370c2f4

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 6 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.1%) to 80.663%

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Files with Coverage Reduction	New Missed Lines	%
apps/indexer/lib/indexer/fetcher/token.ex	1	78.57%
apps/indexer/lib/indexer/fetcher/token_balance.ex	2	87.1%
apps/indexer/lib/indexer/block/fetcher.ex	3	88.0%

Totals
Change from base Build be7d4c0a-8fbe-49ce-ae62-2e3ddf25e349:	-0.1%
Covered Lines:	4893
Relevant Lines:	6066

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💛 - Coveralls

[vbaranov]

@ayrat555 changelog entry is missing

[zachdaniel]

Not really important, but these could all be when reward_type == "external" and index in 0..10.